Multiple punching-machine.



G. P. THOMAS.

MULTIPLE PUNCHING MACHINE.

APPLICATION FILED DEC-5x1912- Patented June 1, 1915.

7 SHEETS-SHEET l.

WlTN ESSESI G. P. THOMAS.

MULTIPLE PUNCHING MACHINE.

APPLICATION FILED DEC. 5, I912.

Patented June 1, 1915.

7 SHEETS-SHEET 2.

VENTOW G. P. THOMAS.

MULTIPLE PUNCHING MACHINE. APPLICATION FILED 0505,1912.

l 1%1 2%1 Patented June 1, 1915.

7 SHEETS-SHEET 3- 4.4 boo/oooooc WITNESSEfiZ E fi/mwfyymmw W agm mvmwfl G. P. THOMAS.

MULTIPLE PUNGHING MACHINE. APPLlCATlQN FILED DEC- 5. 19.12.

Pmmea 1m 1, 1915,

Z SHEETS-SHEET 4.

H55 Hm.

WITNESSES:

G. P. THOMAS.

MULTIPLE PUNCHING MACHINE.

APPLICATION FILED 020.5. 1912.

1 1&1 ,,2% 1 a Patented June 1, 1915,

7 SHEETSSHEET 5.

G. P-. THOMAS.

MULTI'PLE PUNCHING MACHINE.

APPLICATION FILED DEC. 5, I912.

Patented June 1, 1915.

mmmmo 7 SHEETSSHEET 6.

J INVENTOIFI WITH ES$ESI TlEULTlL'fELE FUIG'CHING 'MAGHINE.

nan-44mm Specification of Letters Patent. Patent;

Application filed December 5, 1912. Serial No. 735,123.

To all whom it may concern Be it known that I, GEORGE PAUL THQMAs, residing at Glenshew, in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful improvements in Multiple Punchingdliechines, of which improvement the following is a specificeticn.

The invention described herein relates to machines for punching material, such as structural steel angles, plates, beams, etc., and has to do particularly with. multiple punching machines provided with punchselecting mechanism, which, as the machine operates upon a, blank of material, bring the desired punches into action for each punching stroke.

The object of the invention is to provide it machine for the purpose and of the cheructer described, which will be simple and practical in its construction, and which will be ositive and. ellicient in its operution.

' further object of my invention is to facilitate the setting up or adjustment or" such machines for different arrangements of spacing.

The accompanying drawings, which form part .of the specificetion, illustrate the preferred embodiment of the machine as Well .us some alternate forms in the details of its construction.

Figure l of the drawings is an end View of a multiple punch and punch selector mechanism, wherein the punch selectors are operated at each reciprocation. of the punching heed; Fig. 2 is an end View of a similar punch and punch selector mechanism, together with a spacing table, the operation of the punch selectormechanism with relation to the reciprocation of the punching head heing controlled by the, advance of the spacing carriage; Fig. 3 is a left side or front VlW of the punch and selector mecha nism shown in 1 undfZ, the driving mecl'umisin for the gag controls in this figure being-that illustrated in Fig. 9 rather than that illustrutcd in Fig. 1; Figs. 4 and o are side and. end elevations to an cnlurqcd scale of a single punch selecting gun; Fig. 6 is, an enlurgml end view of the tcinplet cylinder; Fig. 7 is u side View, partly in longitudinal section, of the te nplet cylinder shown in Fig. 6; Figs. 8,9,10,1Lund 12 are enlergeddetail views 0'1? various form justable or removable templet is a sectional View taken on lines Kill, XIII, Fig. 10; Fig. 14 is at bottom plan yiew of the teniplet pins shown in Fig. 11; Fig. 15 is a diagrammatic View of the wiring system employed in the form of machine shown in Fig. 2, such diagram being shown in connection with a spacing tuhle, electric switch, and controlling clutches; Fig. is a detail View of one oi the clutches shown in Fig. 15; 1? is a detail View oi": econ necting' pin; Fig. 18- is :1 d tail VlEW of a portion ofthe templet; Fig. 19 is a plan View of the clutches.

In the several figures like numerals are used to designute like parts, and. like numorals are used with letter .izponents to designate parts, which, in the various modificetions of my invention, have like iunc" tions.

in the practice oil my invention 1 its preferred form it employ u reciprocctiin; head'multiple punch, the type new generally used in all structural steel shops, the head being provided with plurelitv oi laterally adjustable gag punches; and, co OidlilttQd with the punch heed driving mechanism, ll provide means for controlling the gags of the several punches. ll table, with a movable carriage, employed in connection withthe punch to bring a blank of material which is being; punched to the desired successive positions beneath the punches ;nnd said table and carriage are provided with means for controlling said go -controlling menus, whereby the desired arrangements of active punches be eii 'ected upon each reciprocation of the punching head, or whereby the controlling mechunism may be rendered inactive while in number of punching;- operations are efiected, wherein the some arrangement oi uctivepunches is required for such opcrm tion or stroke oi the punching head.

In Fig. 1 (and partly in Fig. 2) of the drawings 1 have illusl uted an embodiment of certain features oi my invention, where in the spacing table and cnrriugc are not prmidod with menus for control ing the ,enug-controllinn incuus, but wherein the do sired arrangement of acting punches is made upon such rcciproculzicnot the punch i ngr heud. Referring first to this embodiuicnt of my invention, the puuichv ironic "W'orlc l is providedwith e reciprocating head 2, "which in turn has n plurality of laterally cd'iustuble and separately removable punch holders 3 and 3 secured to it in two lines. Coiiperating with the punch holders there are two lines of die holders d I. and 4;, mounted on the anvil 5 of the frame 1, which holders are also laterally adjustable andseparately removable. The punch and die holders are of the character shown and described in my Letters Patent No. 1,064,397, and need not be further described herein. The head 2 is caused to reciprocate in the usual manner by means of a rotatable shaft 6, driven by any suitable source of power, but preferably through a clutch mechanism as will be hereinafter described.

'Each line of punch holders 3, 3 is pro vided with punch controlling mechanism, or punch selectors, consisting of atemplet and gums, which, as in the case of the punch and die holders, are also laterally adjustable and separately removable. The templet 7 and the guns 8 control or bring into operative position the gags of the punches 3, while the templet 7 with the guns 8* control the punches 3 there being suitable means provided to move the templct and to reset or release the gags, as will be described hereafter. The tcinplets 7, 7 are cylindrical in form, are rotatably supported by suitable k brackets 9, 9 secured to the punch frame 1,

and are provided with suitably arranged fingers, which trip the desired guns and bring the punches into operation.

Referring now more particularly to the detail construction of the several elements described above, each gun 8, one of which is illustrated to enlarged scale in Figs. 4 and 5, consists of a bell crank lever 10, and a vertically movable rod 11 held normally in raised position by a pivoted trip finger 12 against the resistance of a spring 13. It will be seen, however, that the gun illustrated in Figs. l and 5 in raised position, whereas the gun in Fig. 1 is in lowered or tripped position. The said bell-crank levers are rotatably mounted upon a rod or shaft 14:, and are held at the desired-position on such shaft by means of pins 15 dropping through. slots 137 into holes 16 provided at small intervals in the shaft 14 for the purpose; and, in order to facilitate the removal of said bell crank lever from the shaft lei, the bearing portion of said lever is in two parts, hinged as at 17, and held in closed position by means of a hinged clamping screw 18. The downwaidly-extending arm of said lever 10 is slotted (see Fig. 5) and is provided with a pin 19, over which the link 20 hooks, such link being pivotally connected to a gag 21. he oiltwardlybXtending arm of saidlever is pivot-ally connected to the rod 11; and, in ordei to facilitate the assembling of this connection a knucklejoint is used, wherein a pivot pin 22 is pro vided with a flattened centralportion 23, as shown particularly in Fig. 17, and with a cotter-pin hole 24, the end of the lever arm 10 having a slot 25 adapted to receive the flattened portion 23 of said pin, and having at the inner end of said slot 25 a cylindrical hole of slightly larger diameter than the. pin in connecting the rod 11 to the lever 10, the pin 22 is first inserted in the rod 11, and is held with its flattened sides 23 parallel to the longitudinal extent of the rod by means of a cotter 26 inserted in the hole 24, the head of said cotter being held between lugs 27 projecting from the side of the rod 11. The rod is then held parallel to the outwardly extending lever arm so that the flattened portion 23 of the pin 22 will enter the slot 25 at the end of such arm, after which the rod is turned to its operative vertical position, the pin 22 being rotatably held in the cylindrical hole at the end of the slot The rod 11 is provided also with a lag 29 which is rigidly secured thereto and is adapted to be engaged by a releasing bar 30. A second lug 31 is attached to the rod near the end thereof, and the trip finger 12 is in turn pivoted to said lug. The said finger 12 is preferably a two-part finger, there being a supplementary finger 32 pivoted to the upper end of said finger 12, and so arranged that when the templet is moved from right to left (as seen in Fig. at) the entire finger 12, 32 will be moved when engaged by a teinplet projection; but, when the templet is moved in the opposite direction, the finger 32 will yield against the action of the spring 33 when engaged by a templet projection. The finger 12 is also provided with a shoulder 34: adapted to rest upon a ledge 35 of a frame 36, which frame is removably and adjustably secured to a beam 37 supported by the supplementary punch frame 9. As shown herein, the frame 36 is secured to said beam 3'? by a single bolt 38, the head of which is engaged by a slot enlarged interiorly. The frame 36 also has three sleeves 39, -10 and 41 through which the rod 11 may move, and an arm 42 is formed on the end of the frame, to which arm a spring 43 isattached, said spring being connected at its other end to the finger 12. it will be observed of the gun construction just described that each gun may easily be removed in two parts, by re- -moving the nut on bolt- 38 and by releasing the clamping screw 18. Also, each gun may be adjusted laterally by loosening the nut on said bolt 38 and by removing the pin 15. The guns 8" are similar in construction to the guns 8, and are briefly described hereinafter. As stated above, the tcmplcts 7 and 7" are efi'ective to trip such guns as are necessary. in order to bring desired punches into operation. To such an end the cylindrical face of the templet is provided with fingers 44-. arralnged so as to lie in circumferential lines as well as in longitudiral lines upon such "face, the fingers 4% which lie in each Ill] greases.

manual a circumferential line being adapted to trip the trip-finger 12, 32 of a single gun at desired times, as the punching operation pro- The longitudinal arrangement of the fingers 44 upon the templet is for the purpose of tripping simultaneously the desired guns for each stroke of the punch. The templet 7 is advanced to bring successive'longitudinal lines of fingers 44 into guntripping position by means of a pawl and ratchet mechanism operated by cams mounted on the main punch driving shaft 6. A ratchet wheel 45 is rigidly secured tothe shaft 46' of said templet, such shaft being rotatably mounted in suitable bearings in the supplementary frame 9; and a pawl-provided arm 47 is rotatably mounted on said shaft 46, said pawl being adapted to engage the teeth on said ratchet wheel. An arm 48 is keyed to a shaft 49, which is rotatably mounted in the frames 9, said arm 48 being connected to the arm 47 by a link or red 50.

A second arm 51 is also keyed to the shaft 49, and is provided with a roller adapted to bear upon a cam 52, secured to the shaft 6 preferably near the central portion thereof, such bearing being effected by the action of a spring 53 connected to the arm 48 and frame 9 as shown. The form of the cam 52, as well as its position upon the shaft 6, is such that the templet 7 is rotated a predetermined amount between each stroke of the punching head,-the amount of rotation bemg (when measured on the face of the templet) the distance between successive longitudinal lines of fingers 44. This intermittent advance of the templet' is ell'ected, as will be understood, through cam 52, arm 51, shaft 49, arm 48, link 50, pawl-arm 47, and ratchet wheel 4-5.

In order to raise the guns after each punching operation, and thereby withdraw the gags from operative positions, a releasing mechanism is provided, similar in its general vconstruction to the above described templet-Inovingmechanism. A shaft 54 is rotatably mounted in suitable frames 55, and arms 56, carrying the above mentioned releasing bar 30. are keyed to such shaft. Another arm 57 is also keyed to the shaft on one end, and is provided at its oppo site end with a roller adapted to bear upon a cam 58 secured'to the central portion of the shaft 6. The form of the cam 58 and its position upon the shaft 6 are, as in the case'of the templet-moving mechanism, such that the releasing bar rises between each punching operation. The arrangement of the vparts now described in detail, and the timing of their operation, is preferably as fellows: As the punch head rises the cam 58 causes, through,

arm 57, shaft 54 and arm 56, the releasing bar 30 to rise, and in rising such bar en gages. the lugs 29 of such guns. 8 as have moved to the left so that their shoulders 34 no longer rest upon the ledge 35. The released rods 11 then move downwardly under the action of the springs 13, and the bell crank levers 1O thrust into operative position the gags connected to the tripped guns. Following upon this operation the punch head descends and punches the material be neath it.

The detailed explanation of my punching .machine has been concerned thus far only with the description of the cocperating templet 7, guns 8 and punches 3. The templet 7, which is substantially the same as templet' 7, is effective to control, through guns 8, the o eration of the punches 3 The templet a may be driven simultaneously with the templet 7 by means of a rod 59 r0 vided at its ends with bevel gears, 60 an :60 which mesh with corresponding gears 61 and 61 keyed to the shafts t6 and 456 of the templets 7 and 7, respectively. The guns 8' are constructed substantially the same as the guns 8, and each consists of a bell crank lever '10, a rod 11 and a trip finger 12, 32. Also the frames 36 of the guns 8 are secured to the beam 37. The releasing mechanism for the guns 8" is operated by, and simultaneously with, the releasing mechanism of the guns 8, and consists of a shaft 54*, arms 56 keyed to said shafts 54 and supporting a releasing bar 30*, and an arm 57 also keyed to the shaft 546 and connected to the arm 57 by means of a link 62.

The preferred general construction of the templets 7 and fl is illustrated to enlarged ill) 12-inclusive Iha-ve illustrated various forms I of templet fingers. As far as the mounting of the templets upon their shafts is conce'rned, Figs. 6 and 'l' show, only the mountin of the templet 7.

.n order to obtain rigidity in structure, accuracy in the location of the templet trip fingers, and lightness in weight, 1 form the templet surface of a plurality of separately removable longitudinal elements con.- sisting of Ts 64. Such Ts may be supported by wheels 79, keyed to a sleeve 80. In the templet 7 the sleeve 80 is keyed to the shaft all and in the templct '2' the sleeve 80' is loosely mounted upon the shaft 46, the reason for such mounting appearing hereafter. The connection of the "l"s 64 to the wheels 79 is illustrated to enlarged scale in Fig. 18. The periphery of each wheel 79 is accurately divided into equal spaces, and slots 81 are milled radially into' the periphery, the said slots being of the proper size to receive the leg of the Ts 64. The periphery of each wheel is also provided with screw threaded holes 82, spaced half way between the slots 81, and adapted to receive threaded pins 83 upon which nuts 84 are screwed to hold the Ts in place. I

As explained heretofore the shaft 46 is advanced intermittently by the pawl-provided arm 47 secured to said shaft. This movement of the shaft is directly trans mitted to the templet 7, the sleeve 80 of which is keyed to the shaft 46. However, in the case of the templet 7, rotary movement is imparted thereto through an arm 87 which is keyed to the snaft 46. The end'of the arm 87 is connected to the templet 7 by means of a pin 88, which is secured to a plate 85 attached to the end wheel 79 for the purpose of such connection. This indirect connection of the templet 7 to the shaft 46 is made in order to set the templet 7 and 7 in such accurate relative positions that their respective longitudinal lines of fingers will trip the guns 8 and 8 at exactly the same time. In assembling the machine the hole in the plate 85, in which hole the pin 88 is inserted, is drilled after all the machine parts have been accurately positioned.

In order to move the templet 7 and 7 without the aid of the reciprocating head 2, a hand lever 86 may be keyed to the shaft 46. It will be seen that a reverse movement of the templcts may be effected by suitably lifting the pawl on the pawl-arm 47' and turnin the hand lever 86. Such movement of t e templcts may be advantageously employed between the punching of successive pieces of material when only a portion of the surface of the templet is set up with the desired arrangement of fingers 114:.

Any desired form of fingers 44'. may be sccured to the face of the templet, it being understood however that it is desirable to employ fingers which may be easily adjusted to various positions upon the face of the term plet depending upon the required spacing of the holes to be punched in the blank. The fingers illustrated in Fig. 8 are screw: threaded pins 63, the surface of the templet in this instance the Ts 64 bein provided,

with a plurality of screw-threaded holes. in order to reset or adjust the pins 63, it is necessary to unscrew each pin from one hole .and screw it into another hole. In the construction of Fig. 9 each of the plurality of holes in the T5 64 is provided with a short pin 65, and a spring 66 is clamped between the face of the T and a shoulder 67 on said pin. The trip fingers proper consist of thimbles 68 adapted to be slipped upon the ends of the short pins and held thereon by the springs 66. Such thimbles may be easily and quickly removed from one pin and placed upon another when it becomes desirable to reset the templet. In the construction of Figs. 10 and 13 the tripping fingers 69 are hinged to pins 70, which are secured to the face of the templet. The hinged end of said pins 69 are provided with flat surfaces 71 against which springs 72 bear to hold said fingers in outward position. Also, the hinge axes of said fingers are at right angles to the axis of rotation of the templet so'that the fingers will not swing when they strike the guns. It will be readily understood that the fingers 69, when inoperative, lie in a general horizontal position, as indicated in Fig. 13. In Fi 11 and 14 the tripping fingers are pins ordi ead- .less nails 73 driven into strips of wood 74 at the proper intervals to accomplish the desired tripping of guns for a single stroke of the punch. The strips of wood may be held upon the templet by means of pins 75 and springs 150, as shown in Fig. 14. It will be understood that the pins 73 in each strip 7 at constitute a single longitudinal line of tripping fingers, and that the face of the templet is provided with as many such strips as there are strokes of the puuchin head required to punch a given blank 0 material. In the form of fingers illustrated in Fig. 12, each finger 76 is clamped to any desired position upon the templet by means of set screws 77. For fingers of this type the elements of the tem'plet surface may conveniently be angle irons 78, as shown.

It will be observed of all the forms of fingers, that any finger may be adjusted to any desired position upon the face of the tcmplet, thereby facilitatin the setting up of a templct for new or s ightly diilerent work.

Having thus described my invention as applied to a machine wherein the desired guns for each punching operation are tripped and released during each operation, I will now describe a modification thereof, wherein a given arrangement of guns, when trip )ed, will not be released by the same strolre of the punch, but will remain tripped, and hence cause the same arrangement of holes to be punched in the material for any desired number of strokes. To such an end I preferably connect the templot-moving and the relcasin bar operating-eams to a supplementary shaft. which is preferably driven by the main numb-operating shaft through an intm'posed clutch mechanism, preferably operated by electricity; and I arrange electrical contacts upon the spacing table which become effective at desired intervals to release or bring into operation so tch. The preferred modification st 'zihodying this feature of my in e il ustrated in Figs. 2 and 3 are sluntieily the same as described heretoand shown in the several figures re- "ed in such description, with the excep- The cams 52 and o are keyed; to a supplementary rotatable 121 i] 89 suitably journaled in the frame 1. A clutch menisci- 90 loosely mounted.upon slid shaft 85 and is securely connected to a toothed wheel 91, which meshes with a similar wheel 2 the same dian'ieter mounted on the punch-operating shaft 6 A second clutch in wiher is hey-ed to the shai t 89.

v position of the loosely nuninted clutch member $10 upon the shaft 89 is controlled a solenoid '91, 'Wl'l'liill the core lies 1n ever i-c, pivoted as at 99,,and having its op i positc cud connected to av spring 100. When an ele 1C circuit is completed through the solenoid the core 95 rises and. the spring 100 becomes effective to thrust the clutch member 90 to the right (as seen in Fig. 16)

o. clutch ed between. the o l shaft. To such an end the i s s W 1 1 is connect c too s cove 1,

. mounted on the shaft 6 {not shoi A clutch member 1052 is coi'inecied sleeve 1 01, and a comperstingg clutch )er 103 keyed to the shaft 'ihe' position of united structure, come-ting oi the sleeve 7.01, the Wheel 92 and, clutch member 102, is controlled by oi second solenoid 104: in the same manner as the position of the clutch member 91? is cont olled. A further structural inodiiicat in this form of my invention has do with the am 52 and the arm 51. Said arm -1, instead of having a roller at itsend adapted to bear upon the cam 52, is

provided with a pin 141 which moves throu h. slot 112 in said cam. By such a conswuction the arm 51 is moved positively, and a sprlng, such. as the spring 53 shown ll'i ugrainst the side of said Fig. 1, is not necessary. As in the machine shown in Fig. 1, the arni 57 is provided with a roller and the arm 57 has link connection to the arm 57"..

The construction of the spacing table and carriage SllOWllllGl'GlIl is for the most part described fully in my Letters Patent No. 1,068,465, and therefore need not be here described. The general arrangen'ient and coordination of the spacing table and punch shown. herein, except for the tripping of the guns, is such that the table 106, engaging a blank of material 107 drags such blank beneath the punches and is stopped at desired predetermined intervals. Upon the stop ping of the table a circuit is closed through the solenoid 104- end the punching head opcrates. lhe releasing oil. the carriage effects a breaking of the circuit through said solenoid -1 and the carriage advances to the next stopping point. said application, the punch controlling 'circuit is completed through contacts carried on the arms 108 and 109 of the spacing table.

in order to control the operation of the tempiet so that guns will not be tripped and released when the arrangement of holes desired for a number of successive punching operations is the same, 1 mount a seriesof electrical contact-blocks 11.0, 110 110", etc,

upon the spacing table at such intervals as it is desirable to stop the regular intermittent advance oi the tcinplet, and at points Where it is desirable to start said intermittent advance oi" the teinplet after said templet has been inoperative for a number of strokes. Such control of the templet 1 preferably accomplish bymcans ofa movable solenoid operated switch member 111, together with the solenoid-controlled clutch 90, described above. I

The switch member 111 is preferably in the form of a disk heyedto a shaft 112 and provided with two pairs of contactors 113, 113 and 114, 11 1 Secured to'the disk is 'a ratchet Wheel 1115 provided with eight teeth; and an arm 116, provided with a pawl 11?, is loosely mounted on said shaft 112. The outer end of said arm 116 is connected to the core 140 of a solenoid 118, the arrangement being such that, when a circuitis completed through the. solenoid 11%, the core 140 will rise, and, through arm 116, pawl 117, and ratchet .115, cause the sw tch disk 111 to turn one eighth oi a revolution. The position. 01 the disk 111 in Fig. is such as to complete a circuit through the contzictors 113, and 113, and the solenold, so that a movement of the disk one eighth of a revolution will break the circuit through such solenoid, and a second mo vement of one eighth revolution will br ng the contactors 114-, 1141 into contact with the contact members 119 and 120.

A convenient Wiring system for the com- As described in my plete operation and control of the punch selector mechanism as well as the punching head is diagrammatically illustrated in Fig. 15. The solenoid 118 is connected by a line 121 to the positive circuit wire 122, and the negative circuit wire 123 is electrically connected to each of the electrical contact blocks 110, 110, 110, etc. A finger 124 of conducting material is carried by the spacing table arm 125 in a position to contact successively with said blocks 110, and said finger is connected by a line 126 to the solenoid coil 118. The contacts on the spacing table arms 108 and 109 are connected to lines 127 and 128, respectively, the line 128 dividing into two lines 129 and 130 lead ing to the solenoid cores 104 and 94, respectively; and the line 127 dividing into two lines 131 and 132 leading, respectively, to the switch contact member 120 and the solenoid 104. Also, a line 133 connects the solenoid 94 with the other switch contact member 119.

As the several parts of this controlling mechanism are shown in the drawings, the arrangement is such that the templets 7 and 7 'are, advanced, and desired guns are tripped at each stroke of the punching head during such time as the table passes between the contact blocks 110 and 110*. When the spacing table arm 125 is tripped by any one of thepins 134 lying between said blocks 110 and 110, the arm 109 moves into contact with the arm 108 so that a circuit is closed through both solenoids 104 and 94. The circuit through the solenoid 104 flows through lines 128, 129, 132 and 127; and is effective to lift the core 135 of said solenoid so that the clutch member 102 is brought into engagement with its cooperating clutch member 103, and, in conse quence thereof, the shaft 6 is turned and the punching head 2 is reciprocated. The

circuit through the solenoid '94 flows through lines 128, 130 and 133, contact memhere 119, 113, 118*, and 120, and lines 131 and 127 and is effective to lift the solenoid coil 95, so that the clutch member 'is brought into engagement with its cdoperating clutch member 93 to the end that shaft 89 is rotated and the templets 7 and 7 ad vanced. In this Wiring arrangement it will be understood that the lines 127 and 128 are suitably connected to feed lines, or sources of electrical supply, not shown herein. After the punching head 2 has effected the desired punching of holes for a single reciprocation thereof, the stopping mechanism of the spacing table is released, as

by the hand lever 136, and. substantially simultaneously with such release of the carriage the arm 109 breaks contact with the arm 108 so that the circuits through "the solenoids 94 and 104 are thrown open. v

When the finger 124 strikes'the contact block 110 a circuit is completed through the solenoid 118 and the switch 111 moves one eighth of a revolution, breaking the circuit through the contactors 119 and 120. In this position of the switch each stopping of the carriage will be effective to close a circuit only through solenoid 104, so that the punching head will operate without advancing the templets.

In order to facilitate the setting up of my improved punching machine the longitudinal lines of fingers on the templets may be numbered successively, as shown on Fig. (i, and the stops 184 may be correspondingly numbered.

The operation of each of the several parts of my machine has been described in connection with description of the structure thereof. It will therefore be unnecessary to recite the full operation of the machine.

I do not wish to limit myself to the structural details shown herein for obviously many changes may be made by those skilled in the art without departing from the spirit of my invention as defined in the claims.

I claim herein as my invention:

1. In a punching machine, the pombination with a frame, and a reciprocating head; of a plurality of normally inactive punches adjustably carried by said head, a plurality of separately removable punch selecting guns borne by said frame, and means effective upon the reciprocation of said head to cause said guns to render desired punches active.

2. In a punching machine, the combination with a frame and a reciprocating head; of a plurality of normally inactive punches adjustably borne by said head, a plurality of separately adjustable and separately rcframe and connected to said punches, and

means operating-through said guns for rendering desired punches active.

3. In a punching machine, the combination with a frame and a reciprocating head; ofa plurality of normally inactive punches adjustably borne by said head, a plurality of separately adjustable punch selecting guns borne by said frame, and consisting of movable and stationary members, each of said stationary gun members being secured to said punch frame by a single clamping member, and means cll'cctive upon the reciprocation of said head for moving said mor able gun. members.

4. In a punching machine, the combination with a frame and a reciprocating head; of a plurality of normally inactive punches adjustably secured to said head; a plurality of separately adjustable and separately removable punch selecting guns secured to said frame and operatively connected to said punches; each of said guns consisting of a stationary frame, a rod movable through terrupting connection from the said source of power to said templet-drum while connection is maintained from said source of power to said reciprocating head.

14;. In a metal-punching machine the combination of a source of power, a reciprocatory punching-head and a rotary templet-drum, both driven from said source of power and normally cotirdinated with respect to their several movements, a table over which the work passes in its gradual progress .through said machine, a punchgag in said punching-head, means for interrupting connection from said source of power to said templet, drum, and means operated by the advance of the work upon said table controlling said interrupting means.

15. In a metal-punching machine, the

combination of a punch including a reciprocatory punching head, a spacing-table including a work-carriage, a source of power,

moving the make-and-break device last named.

16. In a. metal-punching machine, the combination of a punching head provided with two sets of punching tools, two sets of movable gags borne by said head and controlling said punching tools, two gagshifting mechanisms, two movable templets,

one controlling each of said gag shifting mechanisms, means for moving one of sai templets, and means operated by the last named templet for moving the second templet, said last named means including an adjustable connecting member.

In testimony whereof I have hereunto set my hand.

GEORGE PAUL THOMAS. Witnesses FRANCIS J. TOMASSON, PAUL N. CnrrcHLow. 

